DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   sump
       n 1: an oil reservoir in an internal combustion engine
       2: a well or other hole in which water has collected
       3: a covered cistern; waste water and sewage flow into it [syn:
          cesspool, cesspit, sink, sump]